<template>
  <!--banner轮播-->
  <div class="swiper-container" ref="Swiper">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="item in swiperData" :key="item.id">
        <img :src="item.imgUrl" />
      </div>
    </div>
    <!-- 如果需要分页器 -->
    <div class="swiper-pagination"></div>

    <!-- 如果需要导航按钮 -->
    <div class="swiper-button-prev"></div>
    <div class="swiper-button-next"></div>
  </div>
</template>

<script>
import Swiper from "swiper";
import "swiper/css/swiper.min.css";
export default {
  name: "Swiper",
  props: ["swiperData"],

  watch: {
    //监听数据改变实例化 swiper
    swiperData: {
      //因为Floor传递过来的数据不会改变所以开启第一次监听
      immediate: true,
      handler() {
        //List的请求回来之前数据是空数组 不能new swiper
        if (!this.swiperData.length) return;

        //数据更新后对应的DOM更新了才执行
        this.$nextTick(() => {
          new Swiper(this.$refs.Swiper, {
            direction: "horizontal", // 垂直切换选项
            loop: true, // 循环模式选项

            // 如果需要分页器
            pagination: {
              el: ".swiper-pagination",
            },

            // 如果需要前进后退按钮
            navigation: {
              nextEl: ".swiper-button-next",
              prevEl: ".swiper-button-prev",
            },
          });
        });
      },
    },
  },
};
</script>

<style>
</style>